CN101597146A - A kind of supplementary cementitious material that improves curing of chloride ion by concrete - Google Patents
A kind of supplementary cementitious material that improves curing of chloride ion by concrete Download PDFInfo
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- CN101597146A CN101597146A CNA2009100653257A CN200910065325A CN101597146A CN 101597146 A CN101597146 A CN 101597146A CN A2009100653257 A CNA2009100653257 A CN A2009100653257A CN 200910065325 A CN200910065325 A CN 200910065325A CN 101597146 A CN101597146 A CN 101597146A
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- concrete
- chloride ion
- cementitious material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The present invention relates to a kind of supplementary cementitious material that improves curing of chloride ion by concrete, by 65-98% active coal gangue, 0-30% have the sieve and silica-sesquioxide of lateral reactivity, the exciting agent of 2-6% is formed.Superior part of the present invention is: can significantly improve the ability of curing of chloride ion by concrete, effectively control the chloride ion content of inside concrete under the bar in chlorine salt solution, finally can reduce the speed of steel bar corrosion in the concrete structure.
Description
One, technical field
The present invention relates to material of construction, be specially a kind of supplementary cementitious material that can improve the curing of chloride ion by concrete ability.
Two, background technology
Because people are not enough to concrete durability understanding, make that a large amount of concrete structures destroys too early both at home and abroad, caused enormous economic loss
[1](Zhao Yu practises for [1] Jin Weiliang, Lv Qingfang, etc. concrete structure durability method of design and life prediction progress [J]. building structure journal, 2007,28 (1): 7-13.).Villaumite is one of principal element that causes Rust of Rebar in Concrete
[2]([2] higher primary school builds, Zhao Zhiman, Sun Wenbo. Steel Concrete electrochemical dechlorination principle and progress [J]. and material Leader, 2007,21 (5): 98-101.).Chlorion in the villaumite arrives rebar surface, and when being adsorbed in local passive film, the local acidification of chlorion makes rebar passivation film destroy, and forms by " corrosion cell "; The anode unpolarizing of chlorion, electric action have quickened the galvanic corrosion effect of reinforcing bar
[3]([3] Ge Yan, Zhu Xichang, Zhu Ya etc. the corrosion of reinforcing bar and galvanic protection [M] in the concrete. Beijing: Chemical Industry Press, 2007.).
Chlorion in concrete has two kinds of existence forms: the one, and the chlorion of free (freedom) in the concrete hole solution; The 2nd, by the chlorion of cement component or hydrated product combination (curing), it can't move freely in concrete hole solution.The chlorion (free chloride ion) that only is dissolved in the concrete hole solution just can work to the corrosion of reinforcing bar.And can not caused the corrosion of reinforcing bar by concrete bonded chlorion (curing of chloride ion), it can reduce the infiltration rate of diffusion of chlorion significantly simultaneously, delays the corrosion of reinforcing bar in the concrete effectively.Therefore, the performance of curing of chloride ion by concrete will directly influence its work-ing life
[4]([4] QiangYuan, Caijun Shi, Geert De Schutter, et al.Chloride binding of cement-basedmaterials subjected to external chloride environment-Areview[J] .Construction and Building Materials, 2009 (23): 1-13.).
Studies show that cement slurry itself has certain binding ability to chlorion, and supplementary cementitious materials such as slag, flyash there is certain enhancement to slurry combined chloride ion ability.From the relevant paper of domestic periodical and journal, generally adopt both at home and abroad and do not mix supplementary cementitious material or singly mix a kind of in slag and the flyash and study them the chlorion solidification.The technical information of this respect was also disclosed in the Chinese patent application, as number of patent application is 20081003079.X, name is called the application of " a kind of admixture and application method thereof that improves cement-base material solidifying dissociative chlorine ion capability ", disclose " is the ability that the admixture of 8～9: 1 sieve and silica-sesquioxide and nitrite composition strengthens curing of chloride ion by concrete with mass ratio ".These achievements in research provide good basis for chloride ion content in the control cement concrete.For enlarging the supplementary cementitious material scope of curing of chloride ion, the present invention is based on Materials science theory and correlative study basis, researched and developed a kind of supplementary cementitious material of curing of chloride ion, in the hope of chloride ion content provides science, reliable technique approach in the concrete in order effectively to control.
Three, summary of the invention
The technical problem that the present invention solves is at steel bar corrosion in the present concrete structure, proposes a kind of supplementary cementitious material that reduces the curing of chloride ion of steel bar corrosion speed measure.This supplementary cementitious material mix the ability that can significantly improve curing of chloride ion by concrete, effectively control the chloride ion content of inside concrete under the bar in chlorine salt solution.
Supplementary cementitious material of the present invention is made up of active coal gangue, the sieve and silica-sesquioxide with lateral reactivity, exciting agent.
Described active coal gangue is a natural gangue through after the 650-750 ℃ of high-temperature calcination, mechanical grinding to specific surface area greater than 400m
2/ kg, the grain diameter greater than 80% is less than the powder of 50um.
Described sieve and silica-sesquioxide is one or both in granulated blast-furnace slag, the flyash.
Described exciting agent is one or more in sodium hydroxide, calcium hydroxide, metasilicate nonahydrate, the potassium silicate.
The proportioning of described supplementary cementitious material is active coal gangue 65-98%, granulated blast-furnace slag 0-30%, flyash 0-30%, exciting agent 2-6%.Wherein the quality parameter of flyash is not less than the index of the second class powered coal ash of national Specification.
Superior part of the present invention is: can significantly improve the ability of curing of chloride ion by concrete, effectively control the chloride ion content of inside concrete under the bar in chlorine salt solution, finally can reduce the speed of steel bar corrosion in the concrete structure.
Four, description of drawings
Fig. 1 is the influences of the different volumes of same prescription supplementary cementitious material to the curing of chloride ion ability
Fig. 2 is the influence of different ingredients supplementary cementitious material to the curing of chloride ion ability
Five, embodiment
Following examples are intended to illustrate the present invention rather than to further qualification of the present invention
Embodiment 1:
Supplementary cementitious material is made up of 98% active coal gangue and 2% exciting agent sodium hydroxide.The above-mentioned supplementary cementitious material that will be equivalent to cement quality 20% is incorporated in the cement, and concrete stirring, making and the maintenance of mixing this supplementary cementitious material are all identical with normal concrete.
Performance test: compare with the plain cement material, the curing of chloride ion performance improves 10.70%.
Embodiment 2
Supplementary cementitious material is made up of 97% active coal gangue and 3% exciting agent calcium hydroxide.The above-mentioned supplementary cementitious material that will be equivalent to cement quality 30% is incorporated in the cement, and concrete stirring, making and the maintenance of mixing this supplementary cementitious material are all identical with normal concrete.
Performance test: compare with the plain cement material, the curing of chloride ion performance improves 41.98%.
Embodiment 3
Supplementary cementitious material is made up of 70% active coal gangue, 25% slag and 5% exciting agent water glass.The above-mentioned supplementary cementitious material that will be equivalent to cement quality 40% is incorporated in the cement, and concrete stirring, making and the maintenance of mixing this supplementary cementitious material are all identical with normal concrete.
Performance test: compare with the plain cement material, the curing of chloride ion performance improves 51.69%.
Embodiment 4
Supplementary cementitious material is made up of 65% active coal gangue, 30% flyash and 5% exciting agent.Wherein exciting agent is made up of calcium hydroxide and potassium silicate, and both ratios are 1 to 4.The above-mentioned supplementary cementitious material that will be equivalent to cement quality 30% is incorporated in the cement, and concrete stirring, making and the maintenance of mixing this supplementary cementitious material are all identical with normal concrete.
Performance test: compare with the plain cement material, the curing of chloride ion performance improves 45.64%.
Supplementary cementitious material is made up of 65% active coal gangue, 20% flyash, 9% slag and 6% exciting agent.Wherein exciting agent is made up of calcium hydroxide and water glass, and both ratios are 1 to 2.The above-mentioned supplementary cementitious material that will be equivalent to cement quality 40% is incorporated in the cement, and concrete stirring, making and the maintenance of mixing this supplementary cementitious material are all identical with normal concrete.
Performance test: compare with the plain cement material, the curing of chloride ion performance improves 48.56%.
Claims (3)
1, a kind of supplementary cementitious material that improves curing of chloride ion by concrete, by 65-98% active coal gangue, 0-30% have the sieve and silica-sesquioxide of lateral reactivity, the exciting agent of 2-6% is formed.
2, a kind of supplementary cementitious material that improves curing of chloride ion by concrete as claimed in claim 1 is characterized in that described sieve and silica-sesquioxide is one or both in granulated blast-furnace slag, the flyash.
3, a kind of supplementary cementitious material that improves curing of chloride ion by concrete as claimed in claim 1 is characterized in that described exciting agent is one or more in sodium hydroxide, calcium hydroxide, water glass, the potassium silicate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100653257A CN101597146A (en) | 2009-06-30 | 2009-06-30 | A kind of supplementary cementitious material that improves curing of chloride ion by concrete |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100653257A CN101597146A (en) | 2009-06-30 | 2009-06-30 | A kind of supplementary cementitious material that improves curing of chloride ion by concrete |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043975A (en) * | 2012-12-20 | 2013-04-17 | 郑州工大建材有限公司 | Mine whole-tailing alkali binding material bond filling material |
| CN104829174A (en) * | 2014-01-25 | 2015-08-12 | 李茜 | Diatomite-based concrete admixture and preparation method thereof |
| CN106746851A (en) * | 2016-12-29 | 2017-05-31 | 北京工业大学 | A kind of method of chlorion crystallized ability in raising hydrated cement paste |
| CN107572969A (en) * | 2017-10-19 | 2018-01-12 | 中国建筑科学研究院 | Sea sand ultrahigh-performance concrete and preparation method thereof |
| CN110183150A (en) * | 2019-04-11 | 2019-08-30 | 武汉理工大学 | A kind of sa waste chloride ion curing agent and its preparation method and application |
| CN113968710A (en) * | 2021-11-01 | 2022-01-25 | 青岛青建新型材料集团有限公司 | Anti-corrosion marine concrete with self-repairing function and preparation method and application thereof |
-
2009
- 2009-06-30 CN CNA2009100653257A patent/CN101597146A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043975A (en) * | 2012-12-20 | 2013-04-17 | 郑州工大建材有限公司 | Mine whole-tailing alkali binding material bond filling material |
| CN103043975B (en) * | 2012-12-20 | 2015-01-07 | 郑州工大建材有限公司 | Mine whole-tailing alkali binding material bond filling material |
| CN104829174A (en) * | 2014-01-25 | 2015-08-12 | 李茜 | Diatomite-based concrete admixture and preparation method thereof |
| CN106746851A (en) * | 2016-12-29 | 2017-05-31 | 北京工业大学 | A kind of method of chlorion crystallized ability in raising hydrated cement paste |
| CN106746851B (en) * | 2016-12-29 | 2019-05-17 | 北京工业大学 | A kind of method of chloride ion crystallized ability in raising hydrated cement paste |
| CN107572969A (en) * | 2017-10-19 | 2018-01-12 | 中国建筑科学研究院 | Sea sand ultrahigh-performance concrete and preparation method thereof |
| CN107572969B (en) * | 2017-10-19 | 2020-04-14 | 中国建筑科学研究院 | Sea sand ultrahigh-performance concrete and preparation method thereof |
| CN110183150A (en) * | 2019-04-11 | 2019-08-30 | 武汉理工大学 | A kind of sa waste chloride ion curing agent and its preparation method and application |
| CN110183150B (en) * | 2019-04-11 | 2022-04-01 | 武汉理工大学 | Silicon-aluminum waste chloride ion curing agent and preparation method and application thereof |
| CN113968710A (en) * | 2021-11-01 | 2022-01-25 | 青岛青建新型材料集团有限公司 | Anti-corrosion marine concrete with self-repairing function and preparation method and application thereof |
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Open date: 20091209 |